Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Relaxation of Skeletal Muscles01:29

Relaxation of Skeletal Muscles

3.4K
The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
3.4K
Boundary Conditions: Lossless Lines01:21

Boundary Conditions: Lossless Lines

116
Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
116
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

515
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
515
Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

328
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
328
Boundary Conditions for Current Density01:25

Boundary Conditions for Current Density

906
Current density becomes discontinuous across an interface of materials with different electrical conductivities. The normal component of the current density is continuous across the boundary.
906
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

1.8K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
1.8K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Relaxation Control of Open Quantum Systems.

Physical review letters·2026
Same author

Shortcuts to Adiabaticity across a Separatrix.

Physical review letters·2025
Same author

Universal and Nonuniversal Signatures in the Scaling Functions of Critical Variables.

Physical review letters·2025
Same author

Neuropeptide oxytocin facilitates its own brain-to-periphery uptake.

Cell reports·2025
Same author

Inverse Mpemba Effect Demonstrated on a Single Trapped Ion Qubit.

Physical review letters·2024
Same author

Metastability of Discrete-Symmetry Flocks.

Physical review letters·2023
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Jul 22, 2025

Mechanical Control of Relaxation Using Intact Cardiac Trabeculae
07:51

Mechanical Control of Relaxation Using Intact Cardiac Trabeculae

Published on: February 17, 2023

1.3K

Relaxation Shortcuts through Boundary Coupling.

Gianluca Teza1, Ran Yaacoby1, Oren Raz1

  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel.

Physical Review Letters
|July 21, 2023
PubMed
Summary
This summary is machine-generated.

The Mpemba effect (ME), where hot systems cool faster than cold ones, can occur through boundary coupling. This study presents a framework showing ME persists even with weak boundary interactions in systems like Ising antiferromagnets.

More Related Videos

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
07:07

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

31.9K
Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
09:25

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

2.0K

Related Experiment Videos

Last Updated: Jul 22, 2025

Mechanical Control of Relaxation Using Intact Cardiac Trabeculae
07:51

Mechanical Control of Relaxation Using Intact Cardiac Trabeculae

Published on: February 17, 2023

1.3K
Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
07:07

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

31.9K
Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
09:25

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

2.0K

Area of Science:

  • Thermodynamics
  • Statistical Mechanics
  • Condensed Matter Physics

Background:

  • The Mpemba effect describes the counterintuitive observation of hotter systems cooling faster than colder ones.
  • This phenomenon has been documented in various systems, including water, magnetic alloys, and polymers.
  • Existing theories predominantly assume bulk coupling, overlooking boundary effects.

Purpose of the Study:

  • To develop a general theoretical framework for anomalous relaxation phenomena driven by boundary coupling.
  • To investigate the manifestation of the Mpemba effect in systems with boundary coupling.
  • To analyze the conditions under which the Mpemba effect can persist in boundary-coupled systems.

Main Methods:

  • Development of a general theoretical framework to characterize anomalous relaxations via boundary coupling.
  • Modeling of two specific systems: a diffusing particle and an Ising antiferromagnet.
  • Analysis of the influence of coupling strength and type on relaxation dynamics.

Main Results:

  • The proposed framework successfully characterizes anomalous relaxations through boundary coupling.
  • The Mpemba effect is demonstrated to be possible in systems with boundary coupling.
  • In the Ising antiferromagnet model, the Mpemba effect was shown to persist even under arbitrarily weak boundary couplings.

Conclusions:

  • Boundary coupling provides a viable mechanism for the Mpemba effect, challenging previous assumptions of bulk coupling.
  • The developed framework offers a generalized approach to understanding anomalous relaxation in diverse physical systems.
  • The persistence of the Mpemba effect under weak boundary couplings highlights its robustness and potential ubiquity.